Question

Given f(x)=2x+5 and g(x)=8x+2
then what is (f−g)(−9)) ?

Answer 1

@UsukiDoll think you could help please ?

Answer 2

first off, (f-g)(x) = f(x)-g(x) = __ ?

Answer 3

8x+2

Answer 4

not quite

f(x) = 2x + 5
g(x) = 8x + 2

f(x) - g(x) = ?

Answer 5

-6x+7?

Answer 6

not quite, check your math one more time

f(x) - g(x) = (2x + 5) - (8x + 2) = ?

Answer 7

-6x+3?

Answer 8

good!

so we know that (f-g)(x) = -6x + 3
so what is (f-g)(-9)= ?

Answer 9

2x+14?

Answer 10

uh... not quite

x = -9
(f-g)(x) = -6x + 3 = ?

Answer 11

8x+11?

Answer 12

x = -9 means replace "x" with "-9" whenever you see it

(f-g)(x) = -6x + 3 = ?

Answer 13

if it's still unclear...

(f-g)(x) = -6x + 3 = -6*(-9) + 3 = ?

Answer 14

57?

Answer 15

right

Answer 16

so thats the answer?

Answer 17

yes

Answer 18

could you help me with a few more please ? @Vocaloid

Answer 19

I need to get going, let me tag @Nnesha

Answer 20

@Nnesha think you could help me with this one please Match the correct graph to the function shown.
f(x)=2sqrt3-4x +3

Answer 21

@Vocaloid thanks for helping. I'm super exhausted right now and just want to browse OpenStudy.